Question about Toshiba 42H83 42" Rear Projection HDTV-Ready Television

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Sound but no picture

I have sound but no picture. Everything else seems to work. Where is the main fuse for the board which powers the CRT's? Is this something I can fix or do I have to take it to a repair facility?

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  • Billtrefry Mar 28, 2008

    sound and picture one night then the next day sound but no picture. Is this somthing I can fix? Toshiba Model 42H82



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The board that powers the crt is the high voltage board and the boards connected to the guns.

Posted on Feb 21, 2008


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I got a Hitachi 42edt41 tv that has sound but no picture. What could be the issue? Everything else seems to work fine

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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1 Answer

How to fix TV

If you are willing to take a chance...and you have some technical skills you may be able to repair it. I was able to replace 2 capacitors on my power board for under $5. I had no picture, no sound. Not saying that is what is your problem. Search the internet for your model number and no picture. I see several youtubes on yours as well.

Jan 24, 2015 | Samsung LN46C630K1FXZA - 46in Lcd Hdtv...

1 Answer

What is the most common problem for no sound on this model of tv, I have replaced the power board and also the main board in this tv and still have no sound

Check its speaker/s first. If found OK, check and replace damaged component/s at its audio output section circuit. Check whether there is picture. With almost all modern TV circuits, there will be no audio, if there is no picture. Keep this in mind.
If you wish to get some details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. Surf the site with patience.

Jan 25, 2014 | Toshiba 26AV502U 26 in. LCD HDTV

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Picture but no sound

the loud pop was a capacitor or a resistor popping, it will need replacing.

Jun 19, 2017 | Vizio JV50P 50 in. Plasma TV

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The audio and picture on my vizio vt470m are scrambling and then the whole tv locks up and turns itself off. tried fixing with the "unplug everything, hold power button for 30 sec, and turn back on...

You could have Bad Capacitors on the Power supply board they will be vented or swollow on Top
1000uf 16v 2200uf 10v 3300uf 10v.
PTS they rebuilt boards 1-800-844-7871

May 30, 2011 | Vizio VT470M 47 in. TV

1 Answer

I can turn power on and i will get sound but no picture. I can get different channels up & down with sound only ,but no picture. It seems that the picture has totally failed as there is no on screen...

This can be caused by a main board failure or a t-con board failure. There is a fuse on the t-con that fails but it is not the standard looking fuse. It is an extremely small, surface mounted component fuse. You have to know what you're looking for to find it. It can be bypassed momentarily and if the picture comes back then the t-con is the problem for sure. You really ought to take it to a shop as this is not something that is easily diagnosed at home.

Aug 28, 2010 | Olevia LT42HVi 42 in. LCD Television

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42'' samsung plasma. no picture, sound only. Power supply board?

I don't think those are fuses but if something is melted chances are it won't work

Jan 31, 2018 | Televison & Video

1 Answer

No picture, no sound, no lights, faint clicking sound, fuse ok

HT transistor, or rectfying diode from chopper transformer is blown.

Apr 24, 2009 | Samsung DynaFlat TXN2668WHF 26" TV

1 Answer

Red light flashing, no picture/sound!!!!

HI, this unit has 3 main fuse links on the main board that may be blown. the fuse links should be check before you move further into the diagnosis stage. once you have checked the fuses and they are still in a working state, this will confirm a power supply board failure. this board provides and regulates the current flow and distribution of it throughout the entire unit. If the fuses are fine and the power supply board is damaged, the green light will come on briefly then, the main control will notice that the power supply is not functioning properly. Once the main control board senses an abnormal current, it will shut down the TV rendering the red light warning. The list of fuses to check are below. Remember, if they are fine and working, the issue will be the power supply board itself and, it will need to be replaced.


3A 12v- fuse----(242208600623)
SM 3A 125v-fuse----(242208600657)
500 MA-fuse-----(242208611092)



Please rate and god bless:)

Apr 13, 2009 | Philips 42PF9631D 42 in. Plasma Television

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